Update torch/utils/cpp_extension.py

jingxu10 · dvrogozh · pytorchmergebot · commit 78de53af7e93 · 2025-04-08T01:59:04.000Z
Co-authored-by: Dmitry Rogozhkin &lt;dmitry.v.rogozhkin@intel.com&gt;
diff --git a/torch/utils/cpp_extension.py b/torch/utils/cpp_extension.py
@@ -291,6 +291,9 @@ def _get_sycl_arch_list():
     arch_list = [x for x in arch_list if not x.startswith('dg2')]
     return ','.join(arch_list)
 
+# If arch list returned by _get_sycl_arch_list() is empty, then sycl kernels will be compiled
+# for default spir64 target and avoid device specific compilations entirely. Further, kernels
+# will be JIT compiled at runtime.
 _COMMON_SYCL_FLAGS = [
     '-fsycl',
     '-fsycl-targets=spir64_gen,spir64' if _get_sycl_arch_list() != '' else '',
